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joneb · August 14, 2012, 10:59 PM

As stated the round on the left maybe a bit heavy, the case mouth distortion from over crimping can hinder chambering. But adequate crimp maybe needed to provide enough start pressure for the powder to burn efficiently.

August 14, 2012, 10:59 PM	#11
joneb Senior Member Join Date: December 10, 2005 Location: Central , OR Posts: 1,888	As stated the round on the left maybe a bit heavy, the case mouth distortion from over crimping can hinder chambering. But adequate crimp maybe needed to provide enough start pressure for the powder to burn efficiently.